Driving means for the rollers of spinning machines



9 19% P. DEVAUX 1,784,659

DRIVING MEANS FOR THE ROLLERS OF SPINNING MACHINES Filed May 14, 1929 2 Sheets-Sheet 1 I I '0// i i wvsmroapqu/ Devan ATTORNEYS Dec. 9, 1930. DEVAUX 7 1,784,659

DRIVING MEANS FOR THE ROLLERS OF SPINNING MACHINES Filed May 14, 1929 2 Sheets-Sheet 2 l N\/ t. NTOR: fi azvaua A'TTQRN'EYS- Patented Dec. 9, 1930 UNITED STATES PATENT OFFICE PAUL nEvAUx, or JJUVISY, FRANCE DRIVING MEANS FOR THEROLLERS or sPINNING MAcnrNEs Application filed May 14, 1929, Serial No.

to a point located as close as possible to the nip of the drawing rollers, that is, constructively, by approachingas much as .possible the nips of two consecutive pairs of rollers, i l 1 The present invention has for its object to provide improved means for conveniently driving rollers of such small size so that the nips of two consecutive pairs of rollers may be brought as close together'as desired, while providing for the necessary strength of such rollers. a e

' The invention has further for its object to keep the advantages of the rollers heretofore employed, and to. obviate their respective drawbacks. 1

According to the' i'nvention, the small roller or rollers, which is or are to be actuated, are made of a magnetic substance, andrest upon a driving shaft which may have the normaldiameter of the rollers of spinning machines, and is driven at one end or in any other suitable manner, the positive drive of said small roller or rollers at the proper speed being secured magnetically by means ofa magnetic field which is causedto pass through said small roller or rollers.

' The small roller or rollers thus havethe small diameter which isn-ecessary to allow them to approach as much as'desired the adjacent pair of rollers. To providefor the proper strength, the rollers may be formed into short sections or are suitably supported upon their whole length. v In a convenient embodiment of the invention, the magnetic field is produced by one or more permanent magnets ofany suitable shape and diameter, mounted on the driving shaft and rotated thereby. I Further features of the invention Will be specified in the following descri tion, with 362,884, and in France March 30, 1929.

reference to the accompanying drawings,

which are given solely by way of example,

tion. a r Figure 1 is a cross-section of a drawing mechanism showing the im roved driving means for small' rollers, .em odying' cylindrical permanent magnets mounted on a driving-shaft. i

Figure 2'is an elevationalview of the driving shaft to which is secured a cylindrical permanent magnet, which" supports and and show various embodiments of the invendrives a small fluted roller, upon which rests a pressure roller.' ,Figure '2 illustrates a modification of the arrangement shown in Figure 2, in which the magnets have the shape of sleeves;

Figure'3 showsdiagrammatically a modification of Figure 1. t

Figure 4 is an elevational view of the permanent magnet shown in Figure 2.

Figure is a cross-section on the line l -4 of Figure 4. V

Referring to Figure 1, land 1 are the usual drawing rollers, T and 7 the usual intermediate rollers, and 8 and 8 the usual feed rollers, of a drawing mechanism of e a known spinning frame or preparing machine.

To control and guide the fibres of the rove or sliver to a point situated as close' as possible to the nip of the drawing roll- 'ers, the mechanism comprises a pair of rollers 2 and 9 of a very small diameter (say 8 millimeters) whereby the nip of rollers 2 and 9 is very close to the nip of thedrawing rollers 1, 1 I Y Asflabove mentioned, it ispractically impossible to drive the roller 2 at one end of the machine, as in the case of rollers of standard size, by reason of the small diameter and great length of such a roller.

According to the invention, roller 2 is positively driven at the proper speed, without torsion or fleXion, by means of a driving shaft 3 having the normal diameter of the rollers used in spinning machines, and upon which said rolleri2 is adapted to rest, the positive connection between roller 2 and shaft 3 being secured by the mutual attraction produced by a magnetic field traversing roller 2, which, for thls purpose, is made of a magnetic substance.

In a convenient form of the apparatus, the magnetic field is produced by permanent magnets forming cylindrical bearings sup porting roller 2, said bearings positively driving roller 2 by the combined effect of the friction and the molecular attraction,

thus obviating any slipping.

As shown in Figures 2 and 1, the permanent magnet 1 may cons st of tWo sleeves 10 and 11, connected together by a cross-member "5,"

deprived of the. cross-member 5, each sleeve thus forming a separate permanent'magnet.

Magnet-s 1 (Figures 1,]2, 4) for sleeves 12 and 13 (Figure 2 are shifted on the driving shaft 3,. andare rotated thereby 'a't'the proper speed.

These improved drivin means permit to reduce the diameter of roller 2 to a minimum. 7

For instance, withadiameter of 9 millimeters for roller 2'and of 22 millimeters for roller 1, the spacing between the nips or" the two pairs of rollers 1.l and 29 is reduced 'to 15 millimeters.

1V ith a roller 1 of larger diameter, the diameter of roller 2 may be reduced in order to preserve the same spacing. For inst-ance,with a diameter of 25 millimeters for roller 1, and

8 millimeters forroller 2 the spacing be tween the nips of the two pairs of rollers 1'1? and 29 is still 15 millimeters, Whil providing between said'rollers the necessary clearance.

Rollers 2 are preteably made of sections wh e length is proportionated to their dianieter, so as to secure the necessary strength. According to the length or" saidrollers, these may be supportedby the stand for the usual lower rollers (Figurelhwith the interposition of smooth bearings, ba ll bearings, or the like. .They may also be supported by thelower parto f the slides, or caps, which su pportsthe usual upper rollers.

The driving shaft 3 may be supported by the usual'stand or in any other manner. As above indicated, said shafthasithe standard diameterfor a lower supporting roller, for instance 13 millimeters in the case where the upper roller 9 rests by its own weight, or a greater diameter in the case of a weighted pressure roller. Shaft 3 may be made of sec- 'tions carrying male and female coupling members at their ends, as in theusual rollers employed in spinning machines. 7

Shaft 3 may thus be driven at its end by rotate roller 2 in the direction of travel of the 1'076 or sliver, that is rollers 2 and 9 will rotate according to the arrows f and f (Figure 1).

Roller 2 may be smooth upon its whole length, as well as the pole-pieces 1011 12 -13.

Shaft 3 may support and actuate several rollers such as 2. For instance, in Fig. 2,

"a shaft 3 carries two rollers 2 and 14, and a shaft3 carries' two'rollers 15, 16. The number of rollers such as 2 may be increased if necessary', and"said rollersmay have equal or unequal diameters, and be imparted the same or'diilerent peripheral speeds.

.In thislatter case, it is. possible to impart to rollers 2 difi erent peripheralspeeds, due to thediflerences between the diameters of the parts or journals resting onthe magnets and the fluted parts carrying'the sliver. I

,As shown by Way. ofexample in Figures 2 and 2*, the width of each pole-piece l011, or each magnet 12'13 is somewhat, less than the width of the smooth journals of roller 2.

. If therollers2, 14, 15, 16 havedifierent diameters at their journals above the magnets and at the fluted parts. carrying the rove, the cross-members 5 connecting the pole-pieces of magnets 1 must berecessed, as shownat .6.

The magnets are secured: to shafts 3-3 on a given gener'ai'rin ofshaft 3 -and'be in contact with roller 2,. the. external magnetic field being somewhat weaker adjacent these parts 5 of magnets 41;.

Dueto the elimination of the cross-mem- V bers 5, sleeves 12-'13 or the like, (Figure. 2?) j permit greater difii'erences between the diameters of the journals and the fluted parts of rollers 2,14, 15, 16;.they may be more readily distributed along thei'driving shafts,inasmuch. as they may be provided in'oddnumber for a givenshaftsection, Whereasthe polepieces 10' and 11 of the magnet-s 1 mustneces- 'sarily beprovided in pairs.

Stationary permanent magnets. maybe placed in;contact with or adj acen't to the movablejmagnets, so asto increase, the magnetic field incase a. high power is required' Stationary permanent magnets may even beer;-

clusively employed, and these' will serve to magneti'ze suitable sleeves, disks or the like,

hav ing any shape and diameter and secured to shaft-s 3 and 3 The stationary permanent magnets, I sub stituted for the movable permanent magnets, may also assure the adhesion. between the existing machines for preparing and spin ning cotton, wool or the like, or to machines to be constructed.

As above stated, the arrangement may comprise one or more units such as 2, 2, 9 in series, these being substituted for, or combined with the usual rollers. For instance, in

Figure 3, and solely by way of example, the

pair of intermediate rollers 7 and 7 is preserved, and the apparatus comprises a set of four pairs of rollers 2, 9-14, 1715, 1816, 19; the upper rollers 9, 17, 18, 19 rest upon the lower rollers 2, 14, 15, 16 whereof the first two are driven by a shaft 3 and the other two by a like shaft 3 by means of magnets such as 4, 12 and 13; it is obvious that all desired combinations of rollers can be provided by adding or. eliminating certain rollers. .It has also been supposed that the peripheral speed increases progressively from the roller 16 to the roller 2, so as to effect the progressive drawing of the rove between the feed rollers 8, 8 and the drawing rollers 1, 1

Obviously, the invention is not limited to the constructional forms herein described and represented, these being given solely by way of example, and numerous modifications may be made without departing from the scope of the invention.

Having now described my invention what I claim as new and desire to secure by Letters Patent is:

1. In a drawing mechanism for textile fibres, a pair of drawing rollers, a driving shaft close tothe lower drawing roller, magnets on said shaft and rotatable therewith, a small roller of magnetic substance resting on said shaft, close to the nip ofsaid drawing rollers, and means for exerting a; pressure upon the textile fibres passing over said small roller.

2. In a drawing mechanism for textile fibres, a driving shaft, cylindrical magnets on said shaft and rotatable therewith and a roller of magnetic substance bearing on said magnets and adapted to be rotated thereby.

3. With a drawing mechanism for textile fibres, the combination of an additional driving shaft close to the lower drawing roller, magnets on said shaft and rotatable there with, a small roller of magnetic substance resting on said shaft, close to the nip of said drawing rollers, and means for exerting a pressure upon the textile fibres'passing over said small roller.

4. In a drawing mechanism for textile fibres, a driving shaft, magnetic sleeves shifted on said shaft and rotatable therewith and at least a roller of magnetic substance resting on said sleeves and adapted to be rotated thereby.

5. Ina. drawing mechanism for textile fibres, a driving shaft, magnetic sleeves 1 shifted on said shaft and rotatable therewlth, cross members of magnetic material for connecting two ad .acent sleeves and a roller of magnetic substance resting on said shaft and adapted to'be rotated thereby.

6. In a drawing mechanism for textile fibres, a driving shaft, magnets on said shaft and rotatable therewith, a magnetic insulation between said shaft and said magnets, and at least a roller of magnetic substance resting gn'said shaft and adapted to be rotated there yi 7. In a drawing mechanism for textile fibres, a driving shaft, magnetic sleevesshift- 1 ed on said shaft and rotatable therewith, a brass lining between said shaft and said magnets, and at least a roller of magnetic substance resting on said shaft and adapted to be rotated thereby.

8. In a drawing mechanism for textile -fibres, a pair of drawing rollers, a driving shaft close to the lower drawing roller, a r e small roller of magnetic substance resting on said shaft close to the nip of said drawing rollers, means for producing a magnetic field through said small roller and urging the latter toward said driving shaft and means for I I exerting a pressure upon the textile fibres passing over said small roller. 7

In testimony. whereof I have signed my name to this specification.

PAUL DEVAUX. 

